A sampling limit for the empirical mode decomposition

N. Stevenson; M. Mesbah; B. Boashash

doi:10.1109/ISSPA.2005.1581021

A sampling limit for the empirical mode decomposition

N. Stevenson^*, M. Mesbah, B. Boashash

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

32 Citations (Scopus)

Abstract

The aim of this paper is to investigate the effect of sampling on the empirical mode decomposition (EMD). To this end, an experiment utilising linear frequency modulated (LFM) signals was used to simulate different sampling rates. This experiment showed that as the frequency content of the signal (f _c) approached the sampling frequency (f_s) the EMD performed poorly due to poor amplitude resolution. This led to a definition of a sampling limit that was 5 times the Nyqvist rate (f_s /10) to improve the performance of the EMD. Comparative simulation with this sampling limit was conducted on a simulated and a real world signal. The results exhibited significant improvement in intrinsic mode function (IMF) orthogonality, the distribution of IMF energy and IMF coherence.

Original language	English
Title of host publication	Proceedings - 8th International Symposium on Signal Processing and its Applications, ISSPA 2005
Pages	647-650
Number of pages	4
Volume	2
DOIs	https://doi.org/10.1109/ISSPA.2005.1581021
Publication status	Published - 2005
Event	8th International Symposium on Signal Processing and its Applications, ISSPA 2005 - Sydney, Australia Duration: Aug 28 2005 → Aug 31 2005

Other

Other	8th International Symposium on Signal Processing and its Applications, ISSPA 2005
Country/Territory	Australia
City	Sydney
Period	8/28/05 → 8/31/05

ASJC Scopus subject areas

Engineering(all)

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10.1109/ISSPA.2005.1581021

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Stevenson, N, Mesbah, M & Boashash, B 2005, A sampling limit for the empirical mode decomposition. in Proceedings - 8th International Symposium on Signal Processing and its Applications, ISSPA 2005. vol. 2, 1581021, pp. 647-650, 8th International Symposium on Signal Processing and its Applications, ISSPA 2005, Sydney, Australia, 8/28/05. https://doi.org/10.1109/ISSPA.2005.1581021

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AB - The aim of this paper is to investigate the effect of sampling on the empirical mode decomposition (EMD). To this end, an experiment utilising linear frequency modulated (LFM) signals was used to simulate different sampling rates. This experiment showed that as the frequency content of the signal (f c) approached the sampling frequency (fs) the EMD performed poorly due to poor amplitude resolution. This led to a definition of a sampling limit that was 5 times the Nyqvist rate (fs /10) to improve the performance of the EMD. Comparative simulation with this sampling limit was conducted on a simulated and a real world signal. The results exhibited significant improvement in intrinsic mode function (IMF) orthogonality, the distribution of IMF energy and IMF coherence.

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A sampling limit for the empirical mode decomposition

Abstract

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